mikuscore mikuscore is a browser-based local score editor focused on preserving existing MusicXML structure while editing. It supports loading MusicXML/ABC/MIDI, score preview, note editing, playback, and export/download as MusicXML/ABC/MEI/MIDI in one screen. MEI support is currently experimental. mikuscore intentionally keeps the feature set small to make score editing practical and fast, especially on smartphones. It is smartphone-centered, but it can also be used on PCs. Workflow: 1) Choose input and load 2) Select from score preview 3) Edit notes 4) Verify by playback and export/download. After loading, click notes in the score to select targets, then adjust pitch and duration. Use tools like MuseScore for large-scale or complex work, and use mikuscore for quick input or focused partial tasks. GitHub

1Input To use mikuscore, first load your score here (from file/source) or create a new score. Supported file types: MusicXML (`.musicxml`, `.xml`, `.mxl`), ABC (`.abc`), MIDI (`.mid`, `.midi`), MEI (`.mei`), LilyPond (`.ly`), MuseScore (`.mscx`, `.mscz`). You can move to Score/Edit/Export after completing this step.

File input Source input New Score

MusicXML Input ABC Input

Use Piano Grand Staff template (treble + bass, single part) Track count (parts) Time signature

/

Key signature

No file selected

MusicXML

ABC

2Score This screen is for checking the loaded score, trying quick playback, and selecting the measure to edit. Select a note in the target measure here, then go to Edit to apply actual note changes in that selected measure.

Playback: idle

3Edit In Edit, start by converting a rest to a note, then adjust notes in the selected measure: split notes, change pitch, add accidentals, and change duration. You can also try quick playback. Press Apply to reflect your edits back to Score, or Discard to cancel current measure edits. Use the arrow buttons to move between measures. Editing is intentionally limited to avoid breaking MusicXML structure, so use a dedicated notation app for fine-grained editing. Track: -

No measure selected

Click a measure in the score to select it

Pitch step

Rest

Accidental

Duration

4Export Export is where you take your work out of mikuscore. The main flow is exporting your edited result as MusicXML. In addition, mikuscore also supports ABC/MEI/LilyPond/MuseScore export and lightweight MIDI output for quick checks. MIDI export is handy for simple confirmation, while complex production/export work is best done in dedicated software.

General Settings

Keep source/extension metadata (`src:*`, `mks:*`) When enabled, metadata is preserved during import and kept in MusicXML output/export. When disabled, metadata generation on import is turned off, and existing `src:*` / `mks:*` fields are omitted from MusicXML output/export.

Compress MusicXML / MuseScore export When enabled, MusicXML export uses `.mxl` and MuseScore export uses `.mscz` (ZIP container). When disabled, plain `.musicxml` / `.mscx` text files are exported.

MIDI & Playback Settings

MIDI & Playback Shared Settings

Grace Timing Mode Applies to MIDI-like playback and MIDI export.

Use metric beat accents Adds subtle beat emphasis in MIDI-like playback and MIDI export. 4/4: strong-weak-medium-weak, 6/8: strong-weak-weak-medium-weak-weak, 3-beat: strong-weak-weak, 5-beat: strong-weak-medium-weak-weak, others: strong-weak-weak-...

Accent amount Controls the velocity gap of metric accents when enabled.

MIDI Settings

MIDI Export Instrument Used when MusicXML does not specify an instrument for the part.

Always override instrument Always override MusicXML instrument with selected export instrument.

Playback Settings

Use MIDI-like playback Uses MIDI-style timing and expression (articulation, grace placement, and related nuance) in quick playback.

Quick Playback Tone